399220554 has 64 divisors (see below), whose sum is σ = 879465600. Its totient is φ = 120667904.

The previous prime is 399220543. The next prime is 399220559. The reversal of 399220554 is 455022993.

It is not an unprimeable number, because it can be changed into a prime (399220559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854629 + ... + 855095.

It is an arithmetic number, because the mean of its divisors is an integer number (13741650).

Almost surely, 2^399220554 is an apocalyptic number.

399220554 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

399220554 is an abundant number, since it is smaller than the sum of its proper divisors (480245046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399220554 is a wasteful number, since it uses less digits than its factorization.

399220554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 399220554 is about 19980.5043479888. The cubic root of 399220554 is about 736.3274045966.

The spelling of 399220554 in words is "three hundred ninety-nine million, two hundred twenty thousand, five hundred fifty-four".